Math 017 Materials With Exercises

Ex.12 Simplify by collecting all like terms.2a) 3 j 4 j 2 jb) 2 a a3c) 0 .2z 0. 5z zd) 2 7m 43 4 3e) x x xf) 2x y x 2y3x11g) x 1h) 3y x x 4y2 22cd 12 3 2 3 2 3i) dc d cj) a b 4ba 6ab3 3443 7 3 1k) x y 2x 3yx 5xl) ab ba 2 338 19 4 8Ex.13 Students were asked to simplify the expression 2(a b) 3a 3b. The following answerswere given.Student A: a bStudent B: b aStudent C: b aStudent D: a bList all students who gave the right answer.Ex.14 Collect like terms, and only then evaluatea) x 1,y 3b) x 2,1y 5c) x 0.5,y 3.22 y 3x 2y y 4x when3 3Ex.15 Evaluate2 1x x x when a) x 45 2 10b) x 102c) x .3If you have not done this yet, simplify the expression by collecting like terms. Compare the obtainedexpression with the results of the evaluations.Ex.16 Write an equivalent expression without parentheses and then collect like termsa) ( 6a 2) 12ab) 4a 7a 2(8a1)c) y 3(y 2)d) 100(t 0.1) 102t2xe) (2x 1)5f) a 0.1(2 3a)g) ( x 1) xh) ( q 6)( 8) 21q4i) 3a 9b (4a b)5j) 2x 5y 4(3x y)67